Gesture Description Language (GDL or GDL Technology) is a method of describing and automatic (computer) syntactic classification of gestures and movements created by doctor Tomasz Hachaj (PhD) and professor Marek R. Ogiela(PhD, DSc). GDL uses context-free formal grammar named GDLs (Gesture Description Language script). With GDLs it is possible to define rules that describe set of gestures. Those rules play similar role as rules in classic

expert system In artificial intelligence, an expert system is a computer system emulating the decision-making ability of a human expert. Expert systems are designed to solve complex problems by reasoning through bodies of knowledge, represented mainly as if� ...

s. With rules it is possible to define static body positions (so called key frames) and sequences of key frames that create together definitions of gestures or movements. The recognition is done by

forward chaining Forward chaining (or forward reasoning) is one of the two main methods of reasoning when using an inference engine and can be described logically as repeated application of ''modus ponens''. Forward chaining is a popular implementation strategy fo ...

inference engine In the field of artificial intelligence, an inference engine is a component of the system that applies logical rules to the knowledge base to deduce new information. The first inference engines were components of expert systems. The typical expert ...

. The latest GDL implementations utilize

Microsoft Microsoft Corporation is an American multinational technology corporation producing computer software, consumer electronics, personal computers, and related services headquartered at the Microsoft Redmond campus located in Redmond, Washing ...

Kinect Kinect is a line of motion sensing input devices produced by Microsoft and first released in 2010. The devices generally contain RGB cameras, and infrared projectors and detectors that map depth through either structured light or time of flig ...

controller and enable real time classification. The license for GDL-based software allows using those programs for educational and scientific purposes for free.

References

{{reflist Classification algorithms Formal languages Gesture recognition